* {
  padding: 0;
  margin: 0;
}

body,html {
  font-size: 14px;
  width: 100%;
  height: 100%;
}

header {
  padding-top: 20px;
  padding-bottom: 10px;
}

header #logo {
  margin-top: -10px;
}

section,footer {
  margin-top: 20px;
  padding: 40px 0;
}

li {
  list-style: none;
}

#foot-wrapper {
  background-color: #f67280;
  color: #fff;
}

#foot-wrapper .foot-nav {
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

#foot-wrapper .foot-nav li {
  float: left;
  width: 4rem;
  height: 3rem;
  text-align: center;
  margin-left: 1rem;
}

#foot-wrapper .foot-nav li a {
  font-size: 1rem;
  color: #fff;
  text-decoration: none;
  display: block;
}

#foot-wrapper .foot-nav li a:hover {
  color: #f36348;
}

.back-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  font-size: 3rem;
  cursor: pointer;
  opacity: 0.1;
  transition: opacity 1s;
}

.back-top:hover {
  opacity: 0.7;
}